双层衬砌圆形水工隧洞力学分析  

Mechanical Analysis of Circular Hydraulic Tunnel with Double Linings

作　　者：祝二浩 袁明道[1] 史永胜[1] 张旭辉[1] 徐云乾[1,2] ZHU Er-hao;YUAN Ming-dao;SHI Yong-sheng;ZHANG Xu-hui;XU Yun-qian(Guangdong Research Institute of Water Resources and Hydropower,Guangzhou 510610,Guangdong Province,China;Institute of Water Conservancy and Hydro-electric Power,Hohai University,Nanjing 210098,Jiangsu Province,China)

机构地区：[1]广东省水利水电科学研究院,广东广州510610 [2]河海大学水利水电学院,江苏南京210098

出　　处：《中国农村水利水电》2023年第10期181-186,192,共7页China Rural Water and Hydropower

基　　金：中国博士后科学基金项目(2020M672557)。

摘　　要：采用复变函数方法提出了一种求解双层衬砌圆形水工隧洞的解析方法。建立的模型基于围岩与初衬、初衬和二衬(完全接触)之间的相互作用,并考虑了内水压作用和支护延迟效应。根据预设的边界条件,基于位移协调和应力连续,建立求解相关解析函数系数的方程,然后利用具体的解析函数,可以求解围岩、初衬和二衬任意位置的应力分量。通过与数值解的比对,证明所提出的解析方法是正确、有效的。最后从控制水工隧洞运行内水压、互换衬砌弹模以及控制衬砌厚度三个角度进行了参数分析,探讨了影响衬砌应力分布的因素和结果。揭示了双层衬砌水工隧洞的荷载传递机理和规律,为衬砌防护工程的前期设计和施工提供了理论依据。Through the complex function method,an analytical method for solving the circular hydraulic tunnel with double lining is proposed.The established model is based on the interaction between the surrounding rock and the primary lining,the primary lining and the secondary lining(full contact),taking internal water pressure and the support delay into account.Based on the preset boundary conditions,the equations for solving the coefficients of the relevant analytic functions can be established,and then the obtained analytical function can be used,the stress components of any point in the surrounding rock,the primary lining and the secondary lining can be solved.By comparing the numerical solution,it is found that the analytical method proposed is correct and effective.At last,the parameters are analyzed from three aspects of controlling the water pressure in the hydraulic tunnel,exchanging the elastic modulus of linings and controlling the thickness of linings,and the factors and results affecting the stress distribution of lining are discussed.The load transfer mechanism and law of the double-lined hydraulic tunnel are revealed,which provides a theoretical basis for the preliminary design and construction of the lining protection project.

关 键 词：圆形水工隧洞 双层衬砌 解析方法 荷载传递机理 

分 类 号：TV31[水利工程—水工结构工程]